CN113323880B

CN113323880B - Double-suction pump convenient to disassemble and inspect and low in vibration noise

Info

Publication number: CN113323880B
Application number: CN202110826332.5A
Authority: CN
Inventors: 刘辉; 宋义兰
Original assignee: Jiangsu Zhongheng Pump Manufacturing Co ltd
Current assignee: Jiangsu Zhongheng Pump Manufacturing Co ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-07-29
Anticipated expiration: 2041-07-21
Also published as: CN113323880A

Abstract

The invention discloses a double-suction pump with low vibration noise and convenient disassembly and inspection, which comprises a pump body and a pump cover positioned above the pump body, wherein the pump body and the pump cover are horizontally opened, a jacking wire is arranged on the pump cover, and the jacking wire is contacted with the upper edge of the pump body; the suction chamber is arranged inside the pump body and the pump cover, the suction chamber forms a suction inlet at the front side of the pump body, the suction chamber forms an exhaust outlet at the rear side of the pump body, an impeller is arranged in the suction chamber, a rotating shaft is arranged on the axial position of the impeller, the left end and the right end of the rotating shaft respectively extend outwards and are arranged on bearing sealing devices connected with the left side and the right side of the pump body, the rotating shaft extends outwards from the bearing sealing device on one side and is connected with an adjusting bearing, the adjusting bearing is connected on an adjusting disc through at least three adjusting mechanisms, the center of the adjusting disc is connected with a coupling through a connecting shaft, the coupling is connected on an output shaft of a motor, and the motor and the pump body are both arranged on a base. The invention has simple disassembly and inspection and can effectively reduce mechanical vibration and noise.

Description

Double-suction pump convenient to disassemble and inspect and low in vibration noise

Technical Field

The invention relates to a double-suction pump, in particular to a double-suction pump which is convenient to disassemble and inspect and low in vibration noise.

Background

The double suction pump is one kind of centrifugal pump, and has the features of high lift, great flow rate, high efficiency, simple structure, etc. and is used widely in engineering project. This pump type essentially merges the water flow coming out through the impeller into a volute. The double suction pump is equivalent to two single suction impellers with the same diameter and works simultaneously, the flow can be doubled under the same outer diameter of the impeller, but the impeller can be abraded in use, the abrasion is irregular, the impeller can not be balanced, mechanical vibration and noise are caused, the double suction pump is used as a device easy to wear, the mechanical structure design is complex and not beneficial to uncovering and overhauling work, the existing double suction pump is generally opened in the horizontal direction of a pump shell, more screw openings are needed to be installed and fixed by adopting the mode, the sealing performance of the pump shell is guaranteed, and the disassembling and inspecting process is relatively complex.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides the double-suction pump which is convenient to disassemble and inspect and has low vibration noise.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a convenient dual suction pump that vibrations noise is low of examining and removing which characterized in that: the pump cover is arranged above the pump body, the pump body and the pump cover are horizontally arranged in a middle, jacking wires are arranged on the pump cover, and the jacking wires are in contact with the upper edge of the pump body;

The suction chamber is arranged inside the pump body and the pump cover, the suction chamber forms a suction inlet at the front side of the pump body, the suction chamber forms an exhaust outlet at the rear side of the pump body, an impeller is arranged in the suction chamber, a rotating shaft is arranged on the axial position of the impeller, the left end and the right end of the rotating shaft respectively extend outwards and are arranged on bearing sealing devices connected with the left side and the right side of the pump body, the rotating shaft extends outwards from the bearing sealing device on one side and is connected with an adjusting bearing, the adjusting bearing is connected on an adjusting disc through at least three adjusting mechanisms, the center of the adjusting disc is connected with a coupling through a connecting shaft, the coupling is connected on an output shaft of a motor, and the motor and the pump body are both arranged on a base.

Further, the bearing sealing device comprises a bearing sleeve, a bearing end cover, a bearing gland and a sealing bearing, wherein the bearing sleeve is sleeved outside the sealing bearing, the bearing end cover seals an opening of the bearing sleeve, a compression spring is connected between the bearing end cover and the pump body, and the bearing sleeve is elastically limited through the bearing gland.

Furthermore, the adjusting mechanism comprises a connecting plate and a supporting arm positioned on the connecting plate, the end part of the supporting arm is contacted with the side wall of the adjusting bearing, and two connecting plate screw holes are formed in the connecting plate.

Furthermore, the adjusting disc is disc-shaped, a plurality of adjusting disc screw holes with the size being consistent with that of the connecting plate screw holes are formed in the adjusting disc, and the distance between every two adjacent adjusting disc screw holes is consistent with that between every two connecting plate screw holes.

Furthermore, the adjusting mechanisms are locked in adjusting disk thread holes of the adjusting disk through screws, and the end parts of the three adjusting mechanisms are correspondingly contacted with the circumferential trisection of the side wall of the adjusting bearing.

Furthermore, sealing rings are sleeved on the rotating shafts on two sides of the impeller, shaft sleeves are arranged on the outer sides of the sealing rings, and two sides of each shaft sleeve are fixed through shaft sleeve nuts.

Further, the shaft of the rotating shaft on the pump body is sealed by soft packing, and a water seal ring is arranged between the soft packing.

Furthermore, the suction inlet and the discharge outlet are both arranged below the axis of the rotating shaft, and the horizontal direction and the axis of the rotating shaft form a vertical position.

Further, the pump body is connected with the pump cover through fastening bolts.

The invention discloses a double suction pump with low vibration noise and convenient disassembly and inspection, a suction inlet is not required to be disassembled during inspection, a pump body and a pump cover form a working chamber of an impeller, the impeller is subjected to static balance check and is fixed by a shaft sleeve and shaft sleeve nuts at two sides, the axial position of the impeller is adjusted by the shaft sleeve nuts, the axial force of the impeller is balanced by the symmetrical arrangement of blades of the impeller, the rest axial force is borne by a sealing bearing at the same shaft end on one hand, on the other hand, the adjusting bearing is borne by the fine adjustment position of an adjusting disc through three adjusting mechanisms, meanwhile, the adjusting mechanisms can overcome the defect that the impeller is abraded in use and generates irregular force to cause the unbalance of the impeller, thereby reducing the mechanical vibration and noise, the whole water pump is directly driven by a motor through a coupler, and is matched with the water seal effect of soft packing sealing, so that the sealing performance is enhanced, the generation of mechanical vibration and noise can be indirectly reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the adjusting mechanism of the present invention on the adjusting plate.

In the figure: 1. a pump body; 2. a pump cover; 3. jacking wires; 4. a suction chamber; 5. a suction inlet; 6. an outlet port; 7. an impeller; 8. a rotating shaft; 9. adjusting the bearing; 10. an adjustment mechanism; 11. adjusting the disc; 12. a connecting shaft; 13. a coupling; 14. a motor; 15. a base; 16. a bearing housing; 17. a bearing end cap; 18. a bearing gland; 19. sealing the bearing; 20. a compression spring; 21. a connecting plate; 22. a support arm; 23. connecting plate screw holes; 24. adjusting the wire coiling hole; 25. a seal ring; 26. a shaft sleeve; 27. a shaft sleeve nut; 28. a water seal ring; 29. and fastening the bolt.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The double-suction pump convenient to disassemble and inspect and low in vibration noise comprises a pump body 1 and a pump cover 2 positioned above the pump body 1, wherein the pump body 1 and the pump cover 2 are horizontally opened, the pump body 1 and the pump cover 2 are connected through a fastening bolt 29, a jacking wire 3 is arranged on the pump cover 2, the jacking wire 3 is in contact with the upper edge of the pump body 1, and the jacking wire 3 can resist the force of the long-time adhesion of the pump body 1 and the pump cover 2 through the longitudinal force exerted by a screw, so that the later maintenance and disassembly and inspection work is facilitated;

The suction chamber 4 is arranged inside the pump body 1 and the pump cover 2, the impeller 7 is arranged in the suction chamber 4, namely, the pump body 1 and the pump cover 2 form a working chamber of the impeller, the suction chamber 4 forms a suction inlet 5 at the front side of the pump body 1, the suction chamber 4 forms an exhaust outlet 6 at the rear side of the pump body 1, the axial position of the impeller 7 is provided with a rotating shaft 8, the rotating shaft 8 is made of high-quality carbon steel, wherein the suction inlet 5 and the exhaust outlet 6 are both arranged below the axial lead of the rotating shaft 8, the horizontal direction and the axial lead of the rotating shaft 8 form a vertical position, and the suction inlet does not need to be detached during maintenance.

The rotating shaft 8 at two sides of the impeller 7 is sleeved with a sealing ring 25, the outer side of the sealing ring 25 is provided with a shaft sleeve 26, and two sides of the shaft sleeve 26 are fixed through shaft sleeve nuts 27. The impeller is subjected to static balance verification and is fixed by a shaft sleeve 26 and shaft sleeve nuts 27 on two sides, and the axial position of the impeller can be adjusted through the shaft sleeve nuts. The left end portion and the right end portion of the rotating shaft 8 extend outwards respectively and are arranged on bearing sealing devices connected with the left side and the right side of the pump body 1, each bearing sealing device comprises a bearing sleeve 16, a bearing end cover 17, a bearing gland 18 and a sealing bearing 19, the bearing sleeves 16 are sleeved outside the sealing bearings 19, openings of the bearing sleeves 16 are sealed by the bearing end covers 17, compression springs 20 are connected between the bearing end covers 17 and the pump body 1, and the bearing sleeves 16 are limited elastically through the bearing glands 18. In addition, the shaft seal of the rotating shaft 8 on the pump body 1 is soft packing seal, in order to prevent air from leaking into the double suction pump, a water seal ring 28 is arranged between the soft packing, and the water seal ring 28 can prevent a small amount of high-pressure water from flowing into the cavity of the soft packing through a water seal pipe to play a water seal role when the double suction pump works.

The rotating shaft 8 is connected with an adjusting bearing 9 extending outwards from a bearing sealing device on one side, the adjusting bearing 9 shown in fig. 2 is connected to an adjusting disc 11 through at least three adjusting mechanisms 10, each adjusting mechanism 10 comprises a connecting plate 21 and a supporting arm 22 positioned on the connecting plate 21, the end of each supporting arm 22 is in contact with the side wall of the adjusting bearing 9, and two connecting plate screw holes 23 are formed in the connecting plate 21. Adjusting disk 11 is discoid, has seted up a plurality of size and the consistent adjusting disk screw hole 24 of connecting plate screw hole 23 on the adjusting disk 11, and the distance of two adjacent adjusting disk screw holes 24 is unanimous with the distance of two connecting plate screw holes 23. The adjusting mechanisms 10 are locked in the adjusting disk thread holes 24 of the adjusting disk 11 through screws, and the end parts of the three adjusting mechanisms 10 are correspondingly contacted with the circumferential trisection of the side wall of the adjusting bearing 9.

The center of adjusting disk 11 is connected with shaft coupling 13 through connecting axle 12, and shaft coupling 13 is connected on the output shaft of motor 14, and motor 14 and pump body 1 all set up on base 15.

When in use, the double-suction pump sucks clean water in from the suction inlet and out from the discharge outlet, the horizontal direction of the suction inlet and the discharge outlet is vertical to the axis, the pump shell is opened and matched with the jacking wires for use, the suction inlet does not need to be disassembled during maintenance, the pump body and the pump cover form a working chamber of the impeller, the impeller is subjected to static balance check and is fixed by the shaft sleeve and the shaft sleeve nuts at two sides, the axial position of the impeller is adjusted by the shaft sleeve nuts, the axial force of the impeller is balanced by utilizing the symmetrical arrangement of blades of the impeller, the other residual axial force is borne by a sealed bearing at the same shaft end on one hand, on the other hand, the adjusting bearing 9 is borne by the fine adjustment position of the adjusting disc 11 through the three adjusting mechanisms 10, meanwhile, the adjusting mechanisms 10 can overcome the abrasion generated in the use of the impeller, irregular force is generated to cause the unbalance of the impeller, thereby reducing mechanical vibration and noise, the whole water pump is directly driven by the motor through the coupler, the shaft seal is matched with the water seal effect of soft packing seal, so that the sealing performance is enhanced, and the mechanical vibration and noise are indirectly reduced.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.

Claims

1. The utility model provides a convenient double entry pump that vibrations noise is low of examining of tearing open which characterized in that: the pump comprises a pump body (1) and a pump cover (2) positioned above the pump body (1), wherein the pump body (1) and the pump cover (2) are horizontally opened, a jacking wire (3) is arranged on the pump cover (2), and the jacking wire (3) is in contact with the upper edge of the pump body (1);

the pump comprises a pump body (1) and a pump cover (2), wherein a suction chamber (4) is arranged inside the pump body (1) and the pump cover (2), the suction chamber (4) forms a suction inlet (5) at the front side of the pump body (1), the suction chamber (4) forms a discharge outlet (6) at the rear side of the pump body (1), an impeller (7) is arranged in the suction chamber (4), a rotating shaft (8) is arranged at the axial position of the impeller (7), the left end part and the right end part of the rotating shaft (8) respectively extend outwards and are arranged on bearing sealing devices connected with the left side and the right side of the pump body (1), the rotating shaft (8) extends outwards from the bearing sealing device at one side and is connected with an adjusting bearing (9), the adjusting bearing (9) is connected on an adjusting disc (11) through at least three adjusting mechanisms (10), the center of the adjusting disc (11) is connected with a coupling (13) through a connecting shaft (12), and the coupling (13) is connected on an output shaft of a motor (14), the motor (14) and the pump body (1) are both arranged on the base (15);

The adjusting mechanism (10) comprises a connecting plate (21) and a supporting arm (22) positioned on the connecting plate (21), the end part of the supporting arm (22) is contacted with the side wall of the adjusting bearing (9), and two connecting plate screw holes (23) are formed in the connecting plate (21);

the adjusting disc (11) is disc-shaped, a plurality of adjusting disc screw holes (24) with the size consistent with that of the connecting plate screw holes (23) are formed in the adjusting disc (11), and the distance between every two adjacent adjusting disc screw holes (24) is consistent with that between every two connecting plate screw holes (23);

the adjusting mechanisms (10) are locked in adjusting disc screw holes (24) of the adjusting disc (11) through screws, and the ends of the three adjusting mechanisms (10) are correspondingly contacted with the circumferential trisections of the side wall of the adjusting bearing (9).

2. The easy-to-disassemble and inspect low-vibration-noise double suction pump according to claim 1, wherein: the bearing sealing device comprises a bearing sleeve (16), a bearing end cover (17), a bearing gland (18) and a sealing bearing (19), wherein the bearing sleeve (16) is sleeved outside the sealing bearing (19), the bearing end cover (17) seals an opening of the bearing sleeve (16), a compression spring (20) is connected between the bearing end cover (17) and the pump body (1), and the bearing sleeve (16) is elastically limited through the bearing gland (18).

3. The easy-to-disassemble and-inspect low-vibration-noise double suction pump according to claim 2, wherein: the impeller is characterized in that sealing rings (25) are sleeved on the rotating shafts (8) on two sides of the impeller (7), shaft sleeves (26) are arranged on the outer sides of the sealing rings (25), and two sides of each shaft sleeve (26) are fixed through shaft sleeve nuts (27).

4. The easy-to-disassemble and inspect low-vibration-noise double suction pump according to claim 3, wherein: the shaft seal of the rotating shaft (8) on the pump body (1) is soft packing seal, and a water seal ring (28) is arranged between the soft packing.

5. The easy-to-disassemble and-inspect low-vibration-noise double suction pump according to claim 4, wherein: the suction inlet (5) and the discharge outlet (6) are both arranged below the axis of the rotating shaft (8), and the horizontal direction and the axis of the rotating shaft (8) form a vertical position.

6. The easy-to-disassemble and-inspect low-vibration-noise double suction pump according to claim 5, wherein: the pump body (1) is connected with the pump cover (2) through a fastening bolt (29).